Step flashing– Sometimes called ‘stepped flashing’, it’s often the preferred alternative to continuous flashing for roof-to-side-wall flashing installations. It describes flashing that overlaps itself. Metal Accessories: Provide cleats, straps, anchoring devices, and similar accessory units as required for installation of work, noncorrosive, size and gauge required for performance. Nails can sometimes lead to issues with inflexibility – not allowing the roof to expand and shrink in different weather conditions – so roofing cement is usually preferable. Examples of flashing on roof elements

The wide variety of uses for copper as a flashing material makes it impossible to discuss installations for all specific conditions. However, the principles behind good applications can be summarized. It’s commonly made from aluminium. Copper is a longer-lasting solution, but is much more expensive. Sternthal, Daniel (2000). Copper flashings in contemporary construction, The Construction Specifier, Magazine of the Construction Specifications Institute, October 2000 Drip edges– Installed on the edges of roofs, drip edges guide water away from the fascia, preventing water from getting under the shingles or gutter. Continuous flashing is one solid piece of material, and is sometimes seen where a sloping roof and a vertical sidewall meet to form a horizontal line.Installation: Installed above windows and doors, or the edges of an entire roof, Drip tray flashings help to control the water flow away from the fascia of the house by providing an efficient course for it to run from the roof.

Smith, Percy Guillemard Llewellyn. Notes on building construction. Part 1. London, Oxford and Cambridge: Rivingtons, 1875. Chapter 10, Plumbers work. Print. Roofing accessories installed integral with roofing membrane are specified in roofing system sections as roofing work. In the US and UK, at least, lead flashing and fittings are still readily available, despite the environmental concerns associated with bulk use of this heavy metal. The Lead Sheet Association touts its recyclability and extreme durability. [15] See also [ edit ]Expansion joints typically use a drive cleat (see Basic Details) set in 2 beads of sealant, 1/4" to 3/8" wide on each side of the joint. Roofing felt is sometimes used in flashing, but should only ever be used in conjunction with another material. Felt itself is not waterproof and is not particularly durable on its own. Sealant Sign up today to join the exclusive program to receive preferred, discounted pricing across the board. POSSIBLY INSERT QUALITY ASSURANCE ARTICLE HERE FOR LIMITATIONS ON FABRICATORS OR INSTALLERS OF COMPLEX SYSTEMS OF FLASHING, RAIN DRAINAGE, EXPANSION JOINTS, ETC. 1.6 QUALITY ASSURANCE It’s worth noting that two-part flashing is often preferred to continuous flashing as it allows for movement as the house contracts and expands during different seasons, reducing the risk of breaks.